# 9709/63 May/June 2010

> 9709/63 May/June 2010: 7 questions, 50 marks. Difficulty 0.38, deviation 0.11, algebraic 0.25, text density 0.34. CIE IAL Mathematics 9709 P6.

- Canonical HTML: https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2010-may-june-9709-63/
- Markdown mirror: https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2010-may-june-9709-63/index.md

---

CIE IAL · Mathematics · 2010 May/June

This Mathematics 9709 Paper 6 (Probability & Statistics 1) paper contains 7 questions worth 50 marks. The profile below reports five mark-weighted difficulty and complexity measures, and every question row repeats them. Full question text and mark scheme open in the Interactive Practice Hub.

- CIE IAL
- 9709 P6
- 7 questions
- 50 marks
- Free paper
- [Practise this paper](https://www.examsci.com/practice?set_id=ceb8707b-67e4-4867-a7cc-27a29b0512f1)
- [All 9709 P6 papers](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/)

Core finding

**9709/63 May/June 2010 is a past paper for CIE IAL Mathematics 9709 Paper 6 (Probability & Statistics 1), with 7 questions worth 50 marks.** Its mark-weighted Difficulty Measure is 0.38 on a 0.20–0.75 scale, with a Difficulty Deviation of 0.11 and a mark split of 28.0% Easy, 72.0% Medium and 0.0% Hard. Algebraic complexity averages 0.25; text density and modelling average 0.34. All five measures use 19 part-level tags, not candidate results. Every question row below repeats them and opens the Interactive Practice Hub for that question.

## Difficulty & complexity profile

All five measures are mark-weighted and calculated from 19 parts carrying 50 part marks. Difficulty tags cover 19 parts, algebraic tags 19 and text-density tags 19. Tags are internal metadata, not official exam-board ratings.

- **Difficulty Measure**: 0.38 — 0.20–0.75 · nearer Medium
- **Difficulty Deviation**: 0.11 — 0 = uniform; higher = more mixed
- **Difficulty Ratio**: 28.0 / 72.0 / 0.0 — % Easy / Medium / Hard
- **Algebraic Complexity Measure**: 0.25 — 0.20–0.75 · nearer Low
- **Text Density and Modelling Measure**: 0.34 — 0.20–0.75 · nearer Medium

Scale: Easy 0.20 · Medium 0.45 · Hard 0.75, and Low 0.20 · Medium 0.45 · High 0.75 for the two complexity measures. [How each band is defined and how the values are calculated →](https://www.examsci.com/guides/difficulty-and-complexity-measures/)

### Definitions and calculation

| Measure | Paper value | Formula |
| --- | --- | --- |
| **Difficulty Measure** | 0.38 | Σ(d_i × w_i) / Σw_i, with d = 0.20 / 0.45 / 0.75 |
| **Difficulty Deviation** | 0.11 | √(Σw_i(d_i − μ)^2 / Σw_i) |
| **Difficulty Ratio** | 28.0% Easy / 72.0% Medium / 0.0% Hard | marks in band / all tagged marks |
| **Algebraic Complexity Measure** | 0.25 | Σ(c_i × marks_i) / Σmarks_i, with c = 0.20 / 0.45 / 0.75 |
| **Text Density and Modelling Measure** | 0.34 | Σ(t_i × marks_i) / Σmarks_i, with t = 0.20 / 0.45 / 0.75 |

w_i equals the part marks, except for a Hard part worth 4 or more marks, where w_i = marks^0.75 to offset the accessible starter steps inside long structured questions.

## Question list

Each measure is recalculated from the parts of that question and uses the same weights as the paper profile.

| Question | Topic | Marks | Difficulty Measure | Algebraic Complexity Measure | Text Density and Modelling Measure | Practice |
| --- | --- | --- | --- | --- | --- | --- |
| **Q1** FRQ | [3 Probability](https://www.examsci.com/topics/cie-ial/mathematics/9709-p6/) | 3 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ceb8707b-67e4-4867-a7cc-27a29b0512f1&question_id=b8768765-7260-4842-95d5-92794f99ab60&source_detail=9709%2F63+May%2FJune+2010) |
| **Q2** FRQ | [1 Representation of data](https://www.examsci.com/topics/cie-ial/mathematics/9709-p6/) | 4 | 0.33 Medium | 0.33 Medium | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ceb8707b-67e4-4867-a7cc-27a29b0512f1&question_id=837c5e3f-34b7-4db1-968f-4d71ac435c5e&source_detail=9709%2F63+May%2FJune+2010) |
| **Q3** FRQ | [4 Discrete random variables](https://www.examsci.com/topics/cie-ial/mathematics/9709-p6/) | 5 | 0.30 Easy | 0.20 Low | 0.40 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ceb8707b-67e4-4867-a7cc-27a29b0512f1&question_id=b9cfd200-9df0-488b-9e42-a016db0f4c9d&source_detail=9709%2F63+May%2FJune+2010) |
| **Q4** FRQ | [2 Permutations and combinations](https://www.examsci.com/topics/cie-ial/mathematics/9709-p6/) | 8 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ceb8707b-67e4-4867-a7cc-27a29b0512f1&question_id=d8f5f9b0-daea-4ab2-ad80-24815ec9b031&source_detail=9709%2F63+May%2FJune+2010) |
| **Q5** FRQ | [3 Probability](https://www.examsci.com/topics/cie-ial/mathematics/9709-p6/) | 9 | 0.39 Medium | 0.28 Low | 0.31 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ceb8707b-67e4-4867-a7cc-27a29b0512f1&question_id=05b6b748-2860-40ca-8f24-1c47de46f07b&source_detail=9709%2F63+May%2FJune+2010) |
| **Q6** FRQ | [1 Representation of data](https://www.examsci.com/topics/cie-ial/mathematics/9709-p6/) | 10 | 0.35 Medium | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ceb8707b-67e4-4867-a7cc-27a29b0512f1&question_id=118ec83f-80a0-48a1-9662-9c983487d2a3&source_detail=9709%2F63+May%2FJune+2010) |
| **Q7** FRQ | [5 The normal distribution](https://www.examsci.com/topics/cie-ial/mathematics/9709-p6/) | 11 | 0.38 Medium | 0.31 Low | 0.38 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ceb8707b-67e4-4867-a7cc-27a29b0512f1&question_id=d640e443-2a17-472a-ac6c-8a2554021e52&source_detail=9709%2F63+May%2FJune+2010) |

## Topics in this paper

- [3 Probability](https://www.examsci.com/topics/cie-ial/mathematics/9709-p6/)
- [1 Representation of data](https://www.examsci.com/topics/cie-ial/mathematics/9709-p6/)
- [4 Discrete random variables](https://www.examsci.com/topics/cie-ial/mathematics/9709-p6/)
- [2 Permutations and combinations](https://www.examsci.com/topics/cie-ial/mathematics/9709-p6/)
- [5 The normal distribution](https://www.examsci.com/topics/cie-ial/mathematics/9709-p6/)

## Related papers

- [9709/61](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2010-october-november-9709-61/) — October/November 2010 — 7 questions · 50 marks — Free
- [9709/62](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2010-october-november-9709-62/) — October/November 2010 — 7 questions · 50 marks — Free
- [9709/63](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2010-october-november-9709-63/) — October/November 2010 — 7 questions · 50 marks — Free
- [9709/61](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2010-may-june-9709-61/) — May/June 2010 — 7 questions · 50 marks — Free
- [9709/62](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2010-may-june-9709-62/) — May/June 2010 — 7 questions · 50 marks — Free
- [9709/61](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2011-october-november-9709-61/) — October/November 2011 — 7 questions · 50 marks — Free

## Paper FAQ

**How are the difficulty and complexity measures calculated?**

Each part is weighted by its official marks. Difficulty uses Easy 0.20, Medium 0.45 and Hard 0.75; algebraic complexity and text density and modelling use Low 0.20, Medium 0.45 and High 0.75. A Hard part worth 4 or more marks is down-weighted to marks^0.75, so the accessible starter steps inside a long structured question do not inflate the difficulty result. This paper's Difficulty Measure is 0.38 from 19 parts.

**What does the Difficulty Deviation show?**

It is the mark-weighted standard deviation of the part difficulty values around the paper mean. A value of 0 would mean every tagged part has the same difficulty; this paper's deviation is 0.11, so its parts are more mixed than a single-level paper.

**Is the Difficulty Ratio based on question counts or marks?**

It is based on official marks, not question counts. This paper's shares are 28.0% Easy, 72.0% Medium and 0.0% Hard; the three shares sum to 100% before rounding.

**Are these official difficulty ratings?**

No. They are derived from the platform's part-level difficulty and static-question-profile tags. They are not exam-board grade boundaries and are not calculated from candidate outcomes. Use them to compare the demand profile of papers, not to predict a grade.

**Why does each question row show its own measures?**

Each row recalculates the same mark-weighted formula from that question's parts. A single-part MCQ therefore shows the tag value directly, while a multi-part structured question blends the tags of its parts using the same Hard-part decay as the paper profile.

---

Full page with native tables, bar charts and Practice Hub links: https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p6/2010-may-june-9709-63/